What is an Andal? Who are the nobles to whom Littlefinger pleads his case? And why is Sansa dressed like a total goth?

As withtherestofthisseasonto this point, we've put together a list of scenes, references, and characters that deserve a special comment or mention. There's no way we got all the good stuff (and we might be wrong on some of the things we've left below)—so please help expand our appendix.